sr- sra srd srf srg sri srl srm srn sro srp srr srs srt ss- ssa ssd ssf ssg ssi ssl ssm ssn sso ssp ssr sss sst sta std stf stg sti stl stm stn sto stp str sts stt taa tad taf tag tai tal tam tan tao tap tar tas tat tda tdd tdf tdg tdi tdl tdm tdn tdo tdp tdr tds tdt tfa tfd tff tfg tfi tfl tfm tfn tfo tfp tfr tfs tft tga tgf tgg tgi tgl tgm tgn tgo tgp tgr tgs tgt tia tid tif tig tii til tim tin tio tip tir tis tit tla tld tlf tlg tli tll tlm tln tlo tlp tlr tls tlt tma tmd tmf tmg tmi tml tmm tmn tmo tmp tmr tms tmt tna tnd tnf tng tni tnl tnm tnn tno tnp tnr tns tnt to- toa tod tof tog toi tol tom ton too top tor tos tot tpa tpd tpf tpg tpi tpl tpm tpn tpo tpp tpr tps tpt tra trd trf trg tri trl trm trn tro trp trr trs trt tsa tsd tsf tsg tsi tsl tsm tsn tso tsp tsr tss tst tta ttd ttf ttg tti ttl ttm ttn tto ttp ttr tts ttt